<!DOCTYPE html>
<html lang="en">

  <head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script>
      /* 
    对象的修改，删除，检测某个属性是否在对象里
    一.修改
    二.删除
    三.in检测属性是否存在,相同的方法：hasOwnProperty();
     */
      var Student = {
        name: "jason",
        age: 20,
        like: function () {
          console.log("钓鱼");
        }
      }
      //修改
      Student['age'] = 25;
      console.log(Student); //03.对象的属性修改，删除，in.html:23 {name: "jason", age: 25, like: f}
      //删除
      delete Student['like'];
      console.log(Student); //03.对象的属性修改，删除，in.html:26 {name: "jason", age: 25}
      //in检测,相同的方法：hasOwnProperty();
      console.log("name" in Student); //true
      console.log("color" in Student); //false
      console.log(Student.hasOwnProperty("name")); //true
    </script>
  </head>

  <body>

  </body>

</html>